Laterally-adjustable thread cutter



I June 4, 1929. E, R, H LMES 0 1,715,923

LATERALLY ADJUSTABLE THREAD CUTTER Filed July 19, 1926 N f [/fir/qge 11. l e/mes dizame s Patented June 4, 1929.

UNITED STATES 1,715,92 PATENT OFFICE.

EIiBRIDGE R. HOLMES, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMPTON &

KNOWLES LOOM WORKS, OF MASSACHUSETTS.

WORCESTER, MASSACHUSETTS, A CORPORATION OF LATERALLY-ADJUSTABLE THREAD CUTTER.

Application filed July 19,

This invention relates to a thread cutter adapted for use on weft replenishing looms to cut the weft ends extending from the selvage to the ejected weft carriers. The invention is particularlydesigned for use on looms such as silk looms in which the width of the goods being woven is sometimes changed and in which an unbalanced upward pull of the harnesses is sometimes encountered.

It is the object of my invention to provide a thread cutter which is so mounted and which may be so adjusted that it can be placed in desired operative position for any width of cloth being woven, and regardless of any unbalanced upward pull which may be exerted on the upper shed of the warp.

My invention further relates to arrange ments and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of the invention is shown in the drawings, in which Fig. 1 is a plan view of portions of a loom embodying my invention Fig. 2 is a sectional side along the line 22 in Fig. 1;

Fig. 3 is an enlarged side elevation of the thread cutter, with the supporting rod shown in section;

Fig. 1 is a sectional plan view, taken along the line d4c in Fig. 3; and

Fig. 5 is a detail sectional elevation, take along the line 55 in Fig. 4.

Referring to the drawings, I have shown port-ions of a loom frame 10, breast beam 11 and lay 12, all of the usual construction. A pair of stands 13 are adjust-ably secured to the breast beam Y11 and provide bearings for plungers 14 which are pressed yieldingly rearward by springs 15. The rearward movement of the plungers is limited by collars or flanges 16 on said plungers.

A cross bar 17 is secured by bolts 18 to the rear ends of the plungers 14. The cross bar 17 forms a support for the thread cutter and also forms an upper cloth guide for the fabric F as it is drawn forward over the breast beam 1].. As av cloth guide, it prevents lifting of the cloth oil the breast beam if the harness pull is unbalanced.

My improved thread cutter comprises a frame member 20 mounted upon a split bushing 21 slidable upon the cross shaft 17. The hub portion 22 (Fig. 5) of the member 20 is elevation, taken 1926. Serial No. 123,250.

also split at one side and is provided with a binding screw 23. A sleeve 25 is loosely mounted on the bushing 21 and a movable cutter blade 26 is riveted to the flange portion 27 of the sleeve 25.

A coil spring 28 surrounds the sleeve25, one end of the spring being secured in the flange 27 and the other end extending into the hub 22 of the frame member 20. The action of the spring is to move the cutter in the direc tion of the arrow a in Fig. 3, thus opening the jaws of the cutter.

A fixed cutter blade 30 is riveted to the flange 32 of the split bushing 21 and extends closely alongside the cutter 26. A guide plate 33 is secured to the side of the fixed cut ter blade 30 and extends laterally therefrom under the edge of the cloth to be trimmed.

A threaded stud 35 is fixed in the cutter blade I 30 and extends through an opening in the member 20. A coil spring 36 and adjusting nuts 37 are provided on the outer end of the stud 35, the spring acting to draw the cutter blades firmly against each other and also firmly against the engaging frame member 20.

Attention is called to Fig. 3, where the movable cutter blade 26 is indicated in dotted lines as being arched over the stud 35, so that the stud does not interfere with free cutting movement of the blade 26. The movable cutter blade 26 also has a depending projection 10 (Fig. 3) adapted to be engaged by a pad ll (Fig. 2) on the front side of the lay 12 each time that the lay moves forward. l

Having thus described the details of construction of my improved thread cutter, the advantages'thereof will be readily apparent. By loosening the screw 23, the split bushing 21 and the parts mounted thereon may be moved along the cross bar 17 to any desired position and may also be adjusted angularly thereon to bring the guide-plate 33 to the desired position under the edge of the fabric F. The cutter in position by tightening the screw 23, and the cutting jaws will thereafter be given an operative movement each time that the lay moves forward.

If a trailing weft end extends from the adjacent selvage to the shuttle box at the repleni shing side of the loom, this trailing end will be advanced in a few picks so that it will enter between the movable blade 26 and the port-ion of the frame 20 may then be secured fixed blade 30 and will be severed on the next forward beat of the lay.

It the thread cutter is engaged by a misplaced shuttle, the plungers lat yield readily to prevent damage to the thread cutter or the shuttle.

My improved thread cutter may thus be very conveniently positioned closely adjacent the selvage of any desired Width of cloth and may also be adjusted angular-1y so that the support 33 will engage and posi tion the cloth on the under side, While the bar 17 engages and positions the cloth 0n the upper side thereof.

Having thus described my invention and the advantages thereof, I do not Wish to be limited to the details herein disclosed otherwise than as set forth in the claims, but what I claim is 1. In a loom, a yieldingly mounted cross bar extending across the fabric parallel to the lay, a thread cutter comprising fixed and movable cutter blades and having a frame member with a splithub portion, a split bushing fitting over said cross bar and Within said hub portion, and means to tighten said hub portion and said bushing on said cross bar in selected adjusted axial and angular position.

2. The combination in a loom as set forth in claim 1, in which one cutter blade is movably mounted on said split bushing and the second cutter blade is fixed to said split bushmg.

3. In a loom, a breast beam, stands mountward and from the adjacent cloth selvage, a

and means effective to secure said thread cutter in a selected axially adjusted position on said cross bar.

4. In a loom, a breast beam, stands mounted on said breast beam beyond the edges i of the fabric, plungers yieldingly mounted in said stands for forward and rearward movement in said loom, a cross bar mounted on the rear ends of said plungers and extending across the fabric parallel to the lay, a thread cutter separately and individually mounted by itself on said cross bar, said outter being adjustable along said cross bar toward and from the adjacent cloth selvage and being also adjustable angularly, and means effective to secure said thread cutter in any selected axially or angularly adjusted position, said thread cutter having fixed and movable cutter blades, and means to draw said blades yieldingly transversely against each other.

In testimony whereof I have hereunto afh'xed my signature.

ELBRIDGE R. HOLMES. 

